Superconducting Fluctuation Effects on the S-1-N Junction Current
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A microscopic study of superconducting fluctuation effects is applied to the investigation of various tunneling currents through an M_1-I-M_2 junction in which the temperature is just above the transition temperature T_c of the metallic film M_2, and is well below that of the metal M_1. The main contribution to the current in the voltage region _eVsimeT-T_c<<T_c comes from the tunneling of Cooper pairs, existing temporarily in M_2 due to fluctuation. It is found out that this current exhibits a qualitatively different behavior according to the condition whether the transmission of particles through a barrier is specular or diffuse. If it is assumed to be specular, the behavior of the current agrees qualitatively with Ferrell's and Scalapino's results obtained by semiphenomenological discussions for the fluctuations.
- 理論物理学刊行会の論文
- 1971-07-25
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